After another emergency, FAA grounds Boeing 787s

In this photo taken by a passenger and distributed by Japan's Kyodo News, passengers leave an All Nippon Airways Boeing 787 after it made an emergency landing at Takamatsu airport in Takamatsu, Kagawa Prefecture, western Japan, Wednesday, Jan. 16, 2013. ANA said a cockpit message showed battery problems and a burning smell was detected in the cockpit and the cabin, forcing the 787 on a domestic flight to land at the airport. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE
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In this photo taken by a passenger and distributed by Japan's Kyodo News, passengers leave an All Nippon Airways Boeing 787 after it made an emergency landing at Takamatsu airport in Takamatsu, Kagawa Prefecture, western Japan, Wednesday, Jan. 16, 2013. ANA said a cockpit message showed battery problems and a burning smell was detected in the cockpit and the cabin, forcing the 787 on a domestic flight to land at the airport. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, HONG KONG, JAPAN, SOUTH KOREA AND FRANCE
/ AP

The NTSB said Wednesday that it would send an investigator to Japan to join the latest probe, and that representatives from the FAA and Boeing were on their way, too.

United frequent flier Josh Feller said he changed his plans to fly a United 787 from Los Angeles to Houston next month because of the 787's troubles.

"I've been following the 787 news closely, and the latest incident finally spooked me into changing my flight," he said by email. "It's an unnecessary risk, and since I was going out of my way to fly the plane in the first place, decided to change flights."

Boeing shares dropped $2.60, or 3.4 percent, to close Wednesday at $74.34, and the selloff continued in after-hours trading.

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Associated Press writers Elaine Kurtenbach and Yuri Kageyama in Tokyo, Kelvin Chan in Hong Kong and Scott Mayerowitz in New York contributed to this report.